12.5 cm Quadrant-Folded Filter Paper, Pre-Folded disks, Qualitative Grade 4 - ZENPORE Fast Flow 125 mm (50 Discs)

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12.5 cm Quadrant-Folded Filter Paper, Pre-Folded Features

• GRADE 4 Q : 12.5cm - Equivalent to Whatman qualitative grade 4 FF, quadrant folded filter paper (125mm)

• PREFOLDED - No more folding! These pre-folded Quadrant filters are ready for the funnel

• FAST PRE-FILTER - Quickly clean-up biological samples and organic extracts, routine clarification

• WINE MAKING - Filtration of musts

• COARSE RETENTION / FAST FLOW - Retains coarse and gelatinous precipitates (20~25 micron)

About 12.5 Cm Quadrant-Folded Filter Paper, Pre-Folded

GRADE 4 Q QUADRANT Qualitative Filter Paper Equivalent to Whatman grade 4 FF, this very fast laboratory filter paper is used for coarse filtration when you need to separate a solid or precipitate from the filtrate. Made from high alpha-cellulose cotton, this standard lab filter is not intended for ashing. APPLICATIONS science : Routine clean-up of insoluble liquids such as biological fluids or organic extracts in labs food : Determination Sodium Chloride in foodstuffs beverage : Filtration of musts in wine metalurgy : Determination of silicon impurities in pig iron and steel environment : Fast flowing air and exhausts monitoring when the collection of fine particles is not critical. COARSE RETENTION Retains coarse particles and gelatinous precipitates like: Metal hydroxides (Al, Cr, Fe, Mg) , Be Oxide Insoluble iron and ore, precipitated Silicates Culture media, and colloidal sediments paper : pure cotton cellulose flow : fast retention : 20~25 μm (coarse) speed : 15~20 s (10ml DIN 53137) size : ⌀ 125 mm thickness : 140 μm weight : 86 g/m² ash : 0.1% qty : 50 discs PRE-FOLDED These Quadrant Folded Filters saves folding time when filtration is done repetitively. Use our pleating equivalent ST004-125v for even faster filtration. Suitable for gravity filtration in standard funnels, not vacuum. EQUIVALENCE & SIZE See the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.